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Montreal Issues 'Boil-Water' Advisory

By

Karen Johnson

Updated May 22, 2013 7:27 p.m. ET

Montreal, Canada's second-largest city, is extending for another day a sweeping "boil-water" advisory that covers a large swath of the metropolitan area, saying residents should boil their tap water before drinking it.

The advisory, in place at least until Thursday afternoon, was issued early Wednesday across much of the city after a problem with routine maintenance at a city water-filtration center.